Electrostatic Loudspeaker Dual Grid Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electrostatic loudspeakers produce weak sound due to low power output and lack of practical usability, with limitations in sound quality and energy storage capacity compared to electrodynamic drivers.
Innovation Solution
The design combines two polarized and charged back grid portions with a diaphragm portion to create alternating electric fields, connected to an audio amplifier circuit module, enhancing sound production and incorporating an ergonomic sound tube angle for comfort, along with waterproof nets for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional electrostatic loudspeaker uses a single grid connected to amplifier poles with an electret film on the diaphragm, then the structure is simple, but the sound output power is very small and cannot meet practical needs
Solution Approach 1:
The patent divides the single grid into two separate grids (first grid and second grid), each connected to different poles of the amplifier. This segmentation allows each grid to contribute independently to sound production, effectively doubling the sound output power while maintaining structural simplicity through the use of two symmetric grid assemblies.
Solution Approach 2:
The patent combines two grid-diaphragm systems into a single integrated loudspeaker unit. The first grid with its electret film and the second grid with its electret film work together, both acting on the same diaphragm, to produce enhanced sound output. The merging of these two systems resolves the power limitation while preserving ease of manufacture through modular assembly.
2Reliability
If the diaphragm is extremely light weight to reduce resonances and improve frequency response, then musical transparency is improved, but the power and sound volume are reduced
Solution Approach 1:
By segmenting the driving force into two independent grid-diaphragm interactions, each light diaphragm can maintain its excellent frequency response characteristics while the combined effect of both grids provides sufficient power. The segmentation allows the light diaphragm to respond accurately to electrical signals without requiring increased mass.
Solution Approach 2:
The patent merges the output of two light diaphragm systems, where each diaphragm maintains its low-mass advantages for frequency response. The combined acoustic output from both diaphragms provides adequate power and volume, resolving the contradiction between light weight and power output.
3Power
If two polarized and charged back grid portions are combined with a diaphragm portion to form alternating electric fields, then sound output is greatly improved, but the device complexity increases
Solution Approach 1:
The patent segments the complex two-grid system into two identical, symmetric modules (first grid with electret film, second grid with electret film). Each module is structurally simple and can be manufactured independently, reducing the overall complexity through modularity and symmetry while achieving doubled sound output power.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in significantly improved sound output, meeting practical needs, offering a simple and stable structure for easy assembly, and providing ergonomic comfort and extended service life through enhanced waterproofing.
Implementation Method 1
sound is generated by the force exerted on a diaphragm suspended in an electrostatic field
Implementation Method 2
Opposing surfaces of the first grid and the second grid are provided with electret thin film layers having permanent charges, respectively
Implementation Method 3
Two polarized and charged back grid portions are combined with a diaphragm portion to form two alternating electric fields, providing great sound
Data Source
AI summary
An electrostatic loudspeaker and an electrostatic headphone are provided. The electrostatic loudspeaker includes a first back grid portion, a second back grid portion, a diaphragm portion, and an audio amplifier circuit module. The two polarized and charged back grid portions are combined with the diaphragm portion to form two alternating electric fields, providing great sound. The structure is simple and can be assembled conveniently.